Incidental Mutation 'R5621:Top2b'
ID 441577
Institutional Source Beutler Lab
Gene Symbol Top2b
Ensembl Gene ENSMUSG00000017485
Gene Name topoisomerase (DNA) II beta
Synonyms Top-2, D230016L12Rik
MMRRC Submission 043279-MU
Accession Numbers
Essential gene? Probably essential (E-score: 0.924) question?
Stock # R5621 (G1)
Quality Score 225
Status Validated
Chromosome 14
Chromosomal Location 6038976-6104585 bp(-) (GRCm39)
Type of Mutation missense
DNA Base Change (assembly) A to T at 16387280 bp (GRCm38)
Zygosity Heterozygous
Amino Acid Change Asparagine to Tyrosine at position 123 (N123Y)
Ref Sequence ENSEMBL: ENSMUSP00000017629 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000017629]
AlphaFold Q64511
Predicted Effect probably damaging
Transcript: ENSMUST00000017629
AA Change: N123Y

PolyPhen 2 Score 1.000 (Sensitivity: 0.00; Specificity: 1.00)
SMART Domains Protein: ENSMUSP00000017629
Gene: ENSMUSG00000017485
AA Change: N123Y

DomainStartEndE-ValueType
Blast:TOP2c 32 70 7e-10 BLAST
HATPase_c 85 234 1.91e-2 SMART
TOP2c 89 679 N/A SMART
TOP4c 702 1175 2.55e-230 SMART
low complexity region 1201 1215 N/A INTRINSIC
low complexity region 1287 1299 N/A INTRINSIC
low complexity region 1324 1336 N/A INTRINSIC
low complexity region 1360 1382 N/A INTRINSIC
Pfam:DTHCT 1495 1597 4.6e-31 PFAM
Predicted Effect noncoding transcript
Transcript: ENSMUST00000159987
Meta Mutation Damage Score 0.6479 question?
Coding Region Coverage
  • 1x: 99.4%
  • 3x: 98.7%
  • 10x: 97.2%
  • 20x: 95.0%
Validation Efficiency 98% (63/64)
MGI Phenotype FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] This gene encodes a DNA topoisomerase, an enzyme that controls and alters the topologic states of DNA during transcription. This nuclear enzyme is involved in processes such as chromosome condensation, chromatid separation, and the relief of torsional stress that occurs during DNA transcription and replication. It catalyzes the transient breaking and rejoining of two strands of duplex DNA which allows the strands to pass through one another, thus altering the topology of DNA. Two forms of this enzyme exist as likely products of a gene duplication event. The gene encoding this form, beta, is localized to chromosome 3 and the alpha form is localized to chromosome 17. The gene encoding this enzyme functions as the target for several anticancer agents and a variety of mutations in this gene have been associated with the development of drug resistance. Reduced activity of this enzyme may also play a role in ataxia-telangiectasia. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2016]
PHENOTYPE: Homozygous null mice exhibit abnormal innervation. Offspring die shortly after birth due to respiratory failure. [provided by MGI curators]
Allele List at MGI
Other mutations in this stock
Total: 54 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
Abcg8 T G 17: 85,003,421 (GRCm39) L417R probably damaging Het
Adrm1b G A 3: 92,335,664 (GRCm39) A346V probably damaging Het
Als2 A G 1: 59,231,049 (GRCm39) V854A probably benign Het
Bbox1 C T 2: 110,122,868 (GRCm39) W140* probably null Het
Ccdc28a A T 10: 18,092,016 (GRCm39) N110K probably benign Het
Chrna6 C T 8: 27,897,068 (GRCm39) E270K probably damaging Het
Cilp A G 9: 65,186,073 (GRCm39) K723E possibly damaging Het
Ciz1 C A 2: 32,261,753 (GRCm39) A455E probably damaging Het
Csmd3 T G 15: 48,177,374 (GRCm39) H388P possibly damaging Het
Dnajc8 A G 4: 132,280,563 (GRCm39) probably benign Het
Dnase1 G T 16: 3,856,982 (GRCm39) C164F probably benign Het
Dync2h1 A T 9: 7,120,909 (GRCm39) I2126K possibly damaging Het
Epha4 G T 1: 77,491,686 (GRCm39) probably benign Het
Fer1l6 T C 15: 58,430,175 (GRCm39) C201R probably damaging Het
Fgf8 T C 19: 45,730,821 (GRCm39) Y68C probably benign Het
Gabrb1 A T 5: 72,266,071 (GRCm39) I243F probably damaging Het
Gpam A C 19: 55,067,692 (GRCm39) S484A probably damaging Het
Hectd2 T A 19: 36,596,151 (GRCm39) N745K probably damaging Het
Hspa13 T C 16: 75,563,651 (GRCm39) probably benign Het
Ints2 A G 11: 86,133,773 (GRCm39) F426L probably benign Het
Ism1 A G 2: 139,520,641 (GRCm39) T18A probably damaging Het
Itih2 T A 2: 10,107,616 (GRCm39) Q650L probably benign Het
Jmjd4 T C 11: 59,341,219 (GRCm39) F50S probably damaging Het
Kif5b T C 18: 6,226,883 (GRCm39) N125S probably benign Het
Lonp1 G C 17: 56,927,263 (GRCm39) A330G probably benign Het
Lrfn1 A G 7: 28,166,261 (GRCm39) I552V probably damaging Het
Mcph1 A G 8: 18,682,186 (GRCm39) E441G probably damaging Het
Mdn1 T A 4: 32,716,371 (GRCm39) H2144Q possibly damaging Het
Mms19 A G 19: 41,954,752 (GRCm39) S56P probably benign Het
Mrgprb3 A G 7: 48,293,116 (GRCm39) I145T probably benign Het
Myh11 G A 16: 14,062,719 (GRCm39) T287I probably damaging Het
Npas2 A G 1: 39,398,794 (GRCm39) T730A probably benign Het
Or4c108 T C 2: 88,803,810 (GRCm39) I142V probably benign Het
Or4c15b G A 2: 89,112,697 (GRCm39) P281L probably damaging Het
Pcdhgb1 A G 18: 37,815,222 (GRCm39) E571G possibly damaging Het
Pcx T A 19: 4,669,195 (GRCm39) V731E possibly damaging Het
Pgm2 T A 5: 64,269,381 (GRCm39) Y489* probably null Het
Rrp12 T C 19: 41,868,856 (GRCm39) T541A probably benign Het
Ryr3 C T 2: 112,731,329 (GRCm39) W660* probably null Het
Sertad2 T A 11: 20,598,061 (GRCm39) F86I possibly damaging Het
Slc11a1 G A 1: 74,420,065 (GRCm39) G191D probably damaging Het
Slc22a22 G T 15: 57,122,547 (GRCm39) F143L probably benign Het
Slc22a28 C T 19: 8,048,376 (GRCm39) V424I probably benign Het
Slc7a11 T G 3: 50,393,324 (GRCm39) K106N probably damaging Het
Smgc A T 15: 91,728,623 (GRCm39) D121V probably damaging Het
Sphk1 C T 11: 116,427,192 (GRCm39) probably benign Het
Spock3 A T 8: 63,597,040 (GRCm39) T118S probably benign Het
Stk17b G T 1: 53,810,943 (GRCm39) S54* probably null Het
Sycp2 A G 2: 178,023,711 (GRCm39) I435T probably benign Het
Tm2d3 G T 7: 65,351,366 (GRCm39) D207Y probably damaging Het
Unc80 A G 1: 66,677,202 (GRCm39) T2044A possibly damaging Het
Usp6nl A G 2: 6,445,243 (GRCm39) S407G probably benign Het
Vmn1r195 G A 13: 22,462,559 (GRCm39) V10I probably benign Het
Zfp292 C T 4: 34,811,703 (GRCm39) R447H probably damaging Het
Other mutations in Top2b
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL00430:Top2b APN 14 16,422,692 (GRCm38) missense probably benign 0.00
IGL00730:Top2b APN 14 16,389,831 (GRCm38) missense probably damaging 1.00
IGL00917:Top2b APN 14 16,407,354 (GRCm38) missense probably benign 0.05
IGL01959:Top2b APN 14 16,422,695 (GRCm38) missense probably benign 0.19
IGL02019:Top2b APN 14 16,409,965 (GRCm38) missense probably benign 0.44
IGL02119:Top2b APN 14 16,406,733 (GRCm38) missense probably damaging 1.00
IGL02136:Top2b APN 14 16,407,103 (GRCm38) unclassified probably benign
IGL02148:Top2b APN 14 16,400,488 (GRCm38) missense probably damaging 1.00
IGL02496:Top2b APN 14 16,387,335 (GRCm38) missense probably benign
IGL02503:Top2b APN 14 16,407,163 (GRCm38) missense possibly damaging 0.92
IGL02672:Top2b APN 14 16,409,166 (GRCm38) unclassified probably benign
IGL02721:Top2b APN 14 16,409,236 (GRCm38) missense probably damaging 1.00
IGL02886:Top2b APN 14 16,365,688 (GRCm38) missense possibly damaging 0.73
IGL03252:Top2b APN 14 16,393,163 (GRCm38) missense possibly damaging 0.60
PIT4434001:Top2b UTSW 14 16,423,780 (GRCm38) critical splice donor site probably null
R0092:Top2b UTSW 14 16,409,263 (GRCm38) missense probably damaging 1.00
R0201:Top2b UTSW 14 16,383,174 (GRCm38) missense probably damaging 1.00
R0390:Top2b UTSW 14 16,418,442 (GRCm38) missense probably benign 0.00
R0394:Top2b UTSW 14 16,413,556 (GRCm38) splice site probably null
R1159:Top2b UTSW 14 16,430,329 (GRCm38) missense possibly damaging 0.81
R1424:Top2b UTSW 14 16,383,177 (GRCm38) missense probably damaging 1.00
R1519:Top2b UTSW 14 16,408,953 (GRCm38) splice site probably null
R1561:Top2b UTSW 14 16,398,993 (GRCm38) missense possibly damaging 0.80
R1713:Top2b UTSW 14 16,409,823 (GRCm38) missense probably benign 0.05
R1987:Top2b UTSW 14 16,398,916 (GRCm38) missense probably damaging 0.99
R2219:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R2287:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R2422:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R2679:Top2b UTSW 14 16,413,947 (GRCm38) missense probably damaging 1.00
R3687:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R3707:Top2b UTSW 14 16,388,447 (GRCm38) missense probably damaging 1.00
R3810:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R3812:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R3815:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R3816:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R3818:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4023:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4025:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4026:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4133:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4157:Top2b UTSW 14 16,384,491 (GRCm38) missense probably benign 0.42
R4179:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4180:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4300:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4376:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4377:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4492:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4549:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4550:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4581:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4582:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4628:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4630:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4667:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4668:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4669:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4698:Top2b UTSW 14 16,387,331 (GRCm38) nonsense probably null
R4769:Top2b UTSW 14 16,398,991 (GRCm38) missense probably damaging 1.00
R4809:Top2b UTSW 14 16,383,125 (GRCm38) missense probably benign 0.06
R4899:Top2b UTSW 14 16,387,313 (GRCm38) missense probably damaging 1.00
R5035:Top2b UTSW 14 16,409,966 (GRCm38) missense probably benign 0.01
R5631:Top2b UTSW 14 16,409,882 (GRCm38) missense probably damaging 1.00
R5685:Top2b UTSW 14 16,413,666 (GRCm38) missense probably damaging 1.00
R5732:Top2b UTSW 14 16,400,106 (GRCm38) missense possibly damaging 0.92
R5939:Top2b UTSW 14 16,422,786 (GRCm38) missense probably damaging 0.96
R6007:Top2b UTSW 14 16,423,779 (GRCm38) critical splice donor site probably null
R6087:Top2b UTSW 14 16,409,864 (GRCm38) missense probably benign 0.14
R6144:Top2b UTSW 14 16,423,740 (GRCm38) missense possibly damaging 0.48
R6196:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R6218:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R6229:Top2b UTSW 14 16,409,838 (GRCm38) missense probably damaging 1.00
R6249:Top2b UTSW 14 16,399,006 (GRCm38) missense probably damaging 1.00
R6337:Top2b UTSW 14 16,399,026 (GRCm38) missense possibly damaging 0.77
R6353:Top2b UTSW 14 16,416,671 (GRCm38) missense probably damaging 1.00
R6512:Top2b UTSW 14 16,409,854 (GRCm38) missense possibly damaging 0.94
R6573:Top2b UTSW 14 16,398,991 (GRCm38) missense probably damaging 1.00
R6614:Top2b UTSW 14 16,407,142 (GRCm38) nonsense probably null
R6844:Top2b UTSW 14 16,429,383 (GRCm38) missense possibly damaging 0.94
R6848:Top2b UTSW 14 16,409,958 (GRCm38) missense possibly damaging 0.89
R6871:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R6895:Top2b UTSW 14 16,413,604 (GRCm38) missense probably benign 0.06
R7162:Top2b UTSW 14 16,416,653 (GRCm38) missense probably benign 0.00
R7247:Top2b UTSW 14 16,416,962 (GRCm38) missense probably benign 0.08
R7250:Top2b UTSW 14 16,420,411 (GRCm38) missense probably benign
R7359:Top2b UTSW 14 16,407,376 (GRCm38) missense probably null 1.00
R7365:Top2b UTSW 14 16,416,649 (GRCm38) missense probably benign 0.04
R7493:Top2b UTSW 14 16,416,605 (GRCm38) missense probably benign 0.00
R7528:Top2b UTSW 14 16,395,427 (GRCm38) nonsense probably null
R7562:Top2b UTSW 14 16,412,946 (GRCm38) missense probably benign 0.04
R7594:Top2b UTSW 14 16,428,587 (GRCm38) missense probably benign
R7670:Top2b UTSW 14 16,416,620 (GRCm38) missense possibly damaging 0.61
R7894:Top2b UTSW 14 16,413,081 (GRCm38) missense possibly damaging 0.68
R8031:Top2b UTSW 14 16,412,986 (GRCm38) missense probably damaging 0.98
R8150:Top2b UTSW 14 16,393,291 (GRCm38) missense probably damaging 0.99
R8214:Top2b UTSW 14 16,383,177 (GRCm38) missense probably damaging 1.00
R8299:Top2b UTSW 14 16,386,123 (GRCm38) missense possibly damaging 0.68
R8977:Top2b UTSW 14 16,393,239 (GRCm38) missense probably benign 0.36
R9562:Top2b UTSW 14 16,365,718 (GRCm38) missense probably benign 0.09
R9565:Top2b UTSW 14 16,365,718 (GRCm38) missense probably benign 0.09
R9798:Top2b UTSW 14 16,389,845 (GRCm38) missense probably damaging 1.00
X0028:Top2b UTSW 14 16,384,499 (GRCm38) nonsense probably null
Z1176:Top2b UTSW 14 16,395,434 (GRCm38) missense probably damaging 1.00
Z1177:Top2b UTSW 14 16,416,953 (GRCm38) missense probably benign
Predicted Primers PCR Primer
(F):5'- CTTGGAGATGGAGAAAGGTTTATTC -3'
(R):5'- TCAGAACGCAAACTGTCAGTTAG -3'

Sequencing Primer
(F):5'- TCTAAGAAATGTTGCAGATCTTACTG -3'
(R):5'- GAACGCAAACTGTCAGTTAGATTAG -3'
Posted On 2016-11-08